Rabina Executive Led Major New York Developments
Ian Michael Klein has directed the construction of high-profile projects, including the 88-story 520 Fifth Avenue.
Updated on Sept. 22, 2026 in Commercial
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Ian Michael Klein, the head of development and construction at Rabina, oversaw the completion of the 88-story tower at 520 Fifth Avenue in August 2026. He previously held roles at the NYCEDC and Macklowe Properties before joining the firm in 2020.
Why it matters
The successful delivery of large-scale, high-density residential towers like the 520 Fifth Avenue project signals a shift toward massive vertical development in New York City's commercial real estate market.
The firm completed the 88-story 520 Fifth Avenue tower in August 2026. Current development plans include a project at 395 Flatbush Avenue, which is projected to become the second-tallest building in Brooklyn.
The players
Ian Michael Klein
He is the 43-year-old head of development and construction at Rabina who previously worked at the NYCEDC and Macklowe Properties.
Rabina
This real estate development firm is responsible for major New York projects including the 520 Fifth Avenue tower.
The details
Klein, who holds architecture degrees from Cornell and Harvard, manages complex projects that require balancing the operation of existing buildings with infrastructure updates. These conversion and new-build efforts often require securing substantial funds against current property portfolios.
Timeline
In 2005, Klein graduated from Cornell University.
In 2010, Klein earned a master's degree from Harvard.
In May 2020, Klein joined Rabina.
In November 2025, 520 Fifth Avenue opened.
In August 2026, 520 Fifth Avenue was fully completed.
Culture Shift
The focus on 88-story towers follows the trend of residential supertall construction in New York City. This development marks a transition in urban density that follows the pattern set by the recent completion of 520 Fifth Avenue.
As Rabina moves forward with the massive 1,300-unit development in Brooklyn, local residents may see significant changes to the skyline and neighborhood density. These large-scale projects often alter local zoning requirements and future property values in the immediate area.
The takeaway
Large-scale urban development requires balancing technical architectural expertise with complex financial maneuvering against existing assets. Readers should note that these high-density projects often take years of planning and municipal approval before moving from site acquisition to full completion.
Further reading
Learn more about the latest projects in the New York City Commercial sector.
Source note: This article includes information reported by Commercial Observer.
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